PhD Despite the increasing focus on impact evaluation, especially in international development, evaluations rarely look at the longer-term impact of evaluations but report on the achievement of shorter-term outcomes. This session makes the case for designing and investing in evaluations that look at whether the intended impacts are achieved and sustained in the long-term and what other impacts (unexpected or adaptive) emerge over time. Sustainability involves durability of outcomes and impacts long after project resources have left. Given the need to emphasize these aspects of these evaluations, we propose a new label for this type – Sustained and Emergent Impact Evaluation (SEIE)